diff --git a/certbot-dns-dnsimple/snap/hooks/post-refresh b/certbot-dns-dnsimple/snap/hooks/post-refresh
index 8f78ae222..3016e8e29 100644
--- a/certbot-dns-dnsimple/snap/hooks/post-refresh
+++ b/certbot-dns-dnsimple/snap/hooks/post-refresh
@@ -10,8 +10,8 @@ cb_installed=$(grep -oP "__version__ = '\K.*(?=')" $SNAP/certbot-shared/__init__
 # get required certbot version for plugin
 cb_required=$(grep -oP "certbot>=\K.*(?=')" $SNAP/setup.py)
 
-python3 -c "from distutils.version import LooseVersion; exit(1) if LooseVersion('$cb_installed')\
-  < LooseVersion('$cb_required') else exit(0)" || exit_code=$?
+python3 -c "from distutils.version import LooseVersion; import sys; sys.exit(1) if\
+  LooseVersion('$cb_installed') < LooseVersion('$cb_required') else sys.exit(0)" || exit_code=$?
 if [ "$exit_code" -eq 1 ]; then
   echo "Certbot is version $cb_installed but needs to be at least $cb_required before" \
     "this plugin can be updated; will try again on next refresh."